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ascleiden.nl

https://ascleiden.nl· First analyzed 18 May 2026· Updated 18 May 2026
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ascleiden.nl
Desktop screenshot of ascleiden.nl
Mobile screenshot of ascleiden.nl
Mobile

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Hosting Provider

Universiteit Leiden

IP Address

132.229.29.88

Site Location

🇳🇱 Netherlandsvia tld

Server Location

🇳🇱 Oegstgeest, Netherlands

ASN

AS1103

Organization

Universiteit Leiden

Server

Microsoft IIS

Nameservers

ns2.surfnet.nl.ns1.surfnet.nl.ns3.surfnet.nl.

Performance

98

Core Web Vitals

Weight

First Contentful Paint
921 ms10%
Speed Index
1.2 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.5 MB
70 requests

Image Optimization

Lazy Load
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Drupal

Technology Stack

8 Technologies Detected

Analytics

2
Google Analytics
Segment

Libraries

1
jQuery

UI Components

1
Lightbox

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

Web Servers

1
Microsoft IISv10.0

Languages

1
PHPv7.4.33

SEO Analysis

D55/100
15
8
4
Meta Tags7/15
Content10/12
Headings3/8
Technical13/25
E-E-A-T3/7
Images2/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
A
ascleiden.nlascleiden.nl

African Studies Centre Leiden |

No description available for this page.

Title Length31 chars

Recommended: 50-60 chars (~183px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (4)

  • • Missing meta description — important for click-through rates in SERPs
  • • Missing H1 tag — every page should have exactly one H1
  • • Most images missing alt text (22/22) — critical for accessibility and SEO

12 issues found

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Crawlability

Sitemap

Type: index

2 URLs

2 sub-sitemaps

robots.txt

2 rules

Allows all crawlers

Local SEO

Local Search Readiness

5/100
Poor
2 13 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

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AI & LLM Readiness

F36/100
Bot Access
20/25
Machine Read.
8/25
Schema Data
0/25
Citation
8/25

AI Bot Access

14/14 accessible
AI Search
OAI-SearchBot
PerplexityBot
Claude-SearchBot
Gemini-Deep-Research
DuckAssistBot
Training
GPTBot
ClaudeBot
Google-Extended
Meta-ExternalAgent
Bytespiderinfo
Amazonbot
Applebot-Extended
CCBotinfo
Fetch
ChatGPT-User

Machine Readability

llms.txt
llms-full.txt
Semantic HTML
Heading Hierarchy
Text ratio:11%
Words:661
Token eff.:Optimal
Sections/1K:1.5

Structured Data

No Schema

Citation Readiness

Opening Summary43w
Descriptive Headingsavg 2w
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (12)
AI readiness recommendation preview...
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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
C
66/100
7
Passed
5
Critical
0
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
6/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
15/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
15/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
9/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
1/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
3 recommendations
  • •Accessibility recommendation preview...
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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
37/100
C
192 mg
CO₂e / view
1.5 MB
Page Weight
60%
Cleaner Than
New Visitor
219 mg
vs
Returning (cached)
109 mg
Annual (10K/mo)
23.0 kg
Emission Segments
Data Center
43 mg
Network
46 mg
Device
103 mg
Resource Breakdown
JavaScript
76.9 KB
Images
1.4 MB
CSS
55.8 KB
HTML
11.8 KB
Green Hosting Not Verified
Universiteit Leiden
5 recommendations
  • •Carbon footprint recommendation preview...
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D

Security Score

56%Poor
Interactive

HTTPS

No WAF

78d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

05.08.2025

Valid Until

05.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (20)

ascleiden.nlwww.connecting-africa.netafrikastudies.nlwww.africaknows.euthesaurus.ascleiden.nlaegis-eu.orgwww.asclibrary.nlafricaknows.eu+12 more

SHA-256 Fingerprint

91:21:8D:17:EA:A5:77:EA:13:35:20:67:56:FF:71:57:30:B2:EA:7E...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control
🔴 No Cache(no-cache, must-revalidate)
content-encoding
📦 Gzip(gzip)
content-language
en
content-length
11799
content-type
text/html; charset=utf-8
date
Mon, 18 May 2026 20:10:40 GMT
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

98

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

ascleiden-nl.o-v1.mx.microsoft

Domain Information

ascleiden.nl

Domain Age
21y 3m

Created

16.02.2005

Last Updated

19.12.2024

Registrar

team.blue nl B.V.

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
F
37/100
Not Mobile Friendly
Viewport Meta
The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
Responsive Design
Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
Touch Icons
Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
Readable Font Size
Base font size should be at least 16px on mobile to ensure text is readable without zooming.
Relative Units
Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
No H-Scroll Risk
No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
Tap Targets OK
Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
No Fixed Widths
No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
3 recommendations
  • •Mobile compatibility recommendation preview...
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Typography & Readability

Georgia

WCAG Partial
55/100
Readability
/30
17/30

13px · LH 1.67

Hierarchy
/20
8/20
WCAG
/25
16/25

1:1 min contrast

Performance
/25
14/25

1 font

Heading Font

Georgia

Serif

Body Font

Georgia

Serif13px

Contrast Ratio

1:1

1 issue

Reading Comfort

~44 CPL

Narrow lines
17px
h2
13px
p

❌ Critical: 13px body text is too small. Minimum 14px, recommend 16px+.

⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 1.0:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

✅ Lean font stack: 1 font families keeps load times fast.

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

Buy on MyFonts

Color Palette

8 unique colors
3.44:1 AA Large Light
#ffffff
Background· 60.8%
#918983
Other· 5.4%
#badfd7
Secondary· 12.1%
#18224f
Accent· 5.6%
#edefe4
Primary· 3.6%
#d7dfde
Secondary· 3.2%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

1

Categories

1

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

6 Resources

6
Scripts
0
Styles
1
Async
0
Defer

Top Script Sources

ascleiden.nl(5)google-analytics.com(1)

Website Identity

ascleiden.nl

asc@asc.leidenuniv.nl
21 years old
Location detected: 🇳🇱 Netherlandsvia tld
team.blue nl B.V.

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Last analyzed: 18 May 2026 at 20:10

Historical Analysis & Change Tracking